You are bidding on a model 329 lamp shade.  This is not a common reproduction.  I believe this is an original 329 based on the thickness of the bottom rim.  At least that is what my shade expert tells me.  It does not have any cracks or chips.  I tested it with a Coleman shade holder and it fits just fine.  Shade measures 9 1/2 inches across the bottom.  It has a top diameter of 4 1/2 inches and is 6 5/8 inches tall. 

All I did was wipe the dust off.  I have not tested this item in any way but I see no reason why it could not be made to work as intended.  I have other Coleman and gas pressure items for sale so please check out my other auctions.